arthur james drake



(No Model.)

J. B. WBYMAN az A. J. az J. A. DRAKB.

GAS 0B OTHER LIKE MOTOR.

Patented July 2, 1895.

UNi'rnD STATES PATENT OFFICE.

J AMES EDVARDES lVEYMAN, ARTHUR JAMES DRAKE, AND J AMES ARTHUR DRAKE, OFGUILDFORD, ENGLAND.

GAS OR OTHER LIKE MOTOR.

EPEGIFICA'IN forniing part of Letters Patent No. 542,124, dated July 2,1895.

Application filed November 16, 1893. Serial No. 491,131. (No model.)Patented in England March 10, 1892, No. 4,735; in Germany June 25,1892,No. 66,958; in Belgium July 8,1892,No.100,492; in France July 8, 1892,No. 222.871, and in Austria-Hungary July 15,1892.No.36,665.

T all 107mm it may conccrn;

Be it known that we, JAMES EDWRDns WEYMAN, ARTHUR Janus DRAKE, and JAMEs ARTHUR DRAKE, subjects of the Queen of Great Britain and Ireland,residing at Guildford, in the county of Surrey, England, have inventedImprovements in or Relating to Gas or other Like Motors, (for whichLetters Patent have been granted in Great Britain, No.

[o 1,735, dated March 10, 1802; in Germany, No. 06,058, dated June 25,1892; in Belgium, No. 100,492, dated July 8, 1802; in France, llo.222,871, dated July 8, 1892, and in Austria- Hungary, No. 36,665, datedJuly 15,1892,) of x5 which the following is a specification.

This invention has for its object to lessen or prevent the noise usuallycaused by the eX- haust-gases escaping from the cylinders of motors,such as are worked by the explosion zo of combustible charges of gas orhydrocarbon vapor and air. For this purpose there is used,

in conjunction with the motor-cylinder, one

or more chambers, (hereinafter called silencing-chambers,) into andthrough which the eXhaust-gases are caused to pass on their way from themotor-cylinder to the external atmosphere, the outlet for connecting thecylinder with the external atmosphere, or for connecting one cylinderwith another when more than one are used, being coutrolled by asuitably-operated valve or valves, as we will now proceed to explain byreference to the accompanyiug drawings, in which- Figures 1 and 2 eachshow, partly in side ele- Vation and partly in Vertical section, aconstruction of apparatus according to this invention in which twosilencing-chambers are used,

the controlling-valve between the said chambers being shown in its openposition in Fig. l

and in its closed position in Fig. 2. Fig. 3 is a plan of the saidapparatus. Fig. 4c is a side elevation to a smaller scale showing somuchv of a gas, oil, or other like engine as is necessary to illustratethe application thereto of apparatus according to this invention.

1 and 2 are two silencing-chambers connected by pi pes 3 3a and anintermediate valvecase a fitted with a valve 5,,one of said chambcrs,namely, 1, being arranged to be placed in communication with theexhaust-port of the motor-cylinder 6 by a pipe 7, so as to receive thegases exhausting therefrom, the other Chamber, viz., 2, being pl'aced incommunication with the external atmosphere by a pipe 8. The pipes ,7 and8 may be variously arranged. Thus in Figs. 1,2,and 3 theyare shown asconnected to the sides of the chambers opposite to those to which thepipes 3 3a are connected and in Fig. l as connected to the tops of thesaid chambers. The valve 5, which is shown of pistou-type, is worked byany suitable means, such as by au eccentric 9 on the crank-shaft 10 ofthe motor, so as to open and close the connection between the twochambers at intervals corresponding to the strokes of the engine, thecommunication being` closed during the time the eXhaust-gases arepassing from the motor-cylinder into the first chamber 1 and openedafter the gases have expanded into the said chainber, whereupon the saideXhaust-gases are allowed to pass into the second chamber, whence theyescape into the external atmosphere with little or no noise.

To provide for explosions that might occur in the first Chamber, thereis preferably arranged between the valve 5 and the rod 5B' by which itis operated a spring 10, such as a coiled spring, by means of which thepistonvalve is permitted to yield and open when necessary and so permitof the escape of the gases under pressure independently of the ordinaryaction of the valve.

When one silencing-chamber only is used, the pipe 3 would be placed indirect communication with the external atmosphere, the communicationbetween this pipe and the pipe Sfi being controlled by a spring-Valve 5,as before.

As will be obvious, instead of placing the go silencing chamber orchambers side by side, as shown, they may be otherwise arranged. Thusthey may be placed one upon the other, and either in close proximity tothe motor or not, as may be desirable.

What we claim is- 1. In a gas or other like motor, the combination withthe motor cylinder, of a silenoing Chamber having its inlet incommunication with the exhaust port of said cylinder, and a positivelyOperating yielding valve arranged to control the Outlet of said Chamberand adapted to open when subjected to excessive pressure substantiallyas herein described for the purposes specified.

2. In a gas or other like motor, the combination with the motorcylinder, of silencing chambers, one having its inlet connected with theexhaust port of said cylinder, and the other having its Outlet incommunication With the external atmosphere, a pipe connectionbetweelsaid chambers, a valve for controlling the fiow of exhaust gasesthrough said pipe connection from one Chamber to the other, and meansfor Operating said valve substantially as herein described for thepurpose set forth.

v3. In a gas or other like motor, the combination with the motorcylinder, of silencing cha1nbers,0ne havingits inlet connected with theexhaust port of said cylinder, and the other having its outlet incommunication with the external atmosphere, a pipe connection betweensaid chambers, a spring valve arranged to Control the flow of exhaustgases from one Chamber to the other through said pipe connection andadapted to yield and open When subjected to excessive pressure, andmeans for Operating said Valve substantially as herein described'for thepurposes specified.

4. In a gas or other like motor, the combination with the motorcylinder, of silencing` chambers l and 2 pipes 3 3a with interposedvalve chamber 4 connecting said Chambers, pipes connecting the'inlet ofsaid Chamber 1 With the exhaust port of said motor and the 'Outlet ofsaid Chamber 2 with the external

